Ruby: counting digits in a float number
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19-09-2019 - |
Question
Is there any worthy Ruby method to count the number of digits in a float? Also, how do I specify the precise when to_s float numbers?
Solution
# Number of digits
12345.23.to_s.split("").size -1 #=> 7
# The precious part
("." + 12345.23.to_s.split(".")[1]).to_f #=> .023
# I would rather used
# 12345.23 - 12345.23.to_i
# but this gives 0.22999999999563
OTHER TIPS
to specify precision of a float in Ruby. you can use the round method.
number.round(2)
2 is the precision.
53.819.round(2) -> 53.82
I think you should check out the number_with_precision helper.
number_with_precision(13, :precision => 5) # => 13.00000
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